Percentage of interest acquired in an asset acquisition.

No definition available.

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- Definition

The minimum amount to be raised on listing event.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

The period for extension to exercise the right under the agreement.

+ References

No definition available.

+ Details

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- Definition

Number of extensions under the mineral rights agreement.

+ References

No definition available.

+ Details

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- Definition

The amount of expenses incurred for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The amount of consideration for repurchase of full of the net smelter return royalty

+ References

No definition available.

+ Details

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- Definition

The amount of consideration for repurchase of half of the net smelter return royalty

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The percentage of net smelter return royalty payable, under the mining rights transaction.

+ References

No definition available.

+ Details

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- Definition

Amount of consideration payments to be made for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The percentage of ownership interests in the mineral rights property acquired during the period.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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- Definition

Amount of expenses incurred as reimbursements made to the party for the mineral rights acquired in the transaction.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Value of shares issued adjusted for the increase in the spot price for the mineral rights acquired in the transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The value of shares issued for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The percentage of increase in spot price.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the threshold number of days deadline for the grant of net smelter return (NSR) after the closing of de-SPAC transaction.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
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-Section 15
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480123/805-50-15-3

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- Definition

Carrying amount at the balance sheet date of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, net of amortization.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

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Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
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-Section 45
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-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

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ACQUISITION OF OREGON ENERGY (Details)							9 Months Ended
ACQUISITION OF OREGON ENERGY (Details)	Feb. 24, 2026 USD ($) shares	Nov. 26, 2025	Nov. 18, 2025 USD ($)	May 18, 2025 USD ($)	Dec. 18, 2024 USD ($)	Nov. 18, 2024 USD ($) item	Aug. 31, 2026 USD ($)	Aug. 31, 2025 USD ($)
ACQUISITION OF OREGON ENERGY
Cash paid as consideration							$ 18,155	$ 773,651
Oregon Energy LLC
ACQUISITION OF OREGON ENERGY
Percentage of interests acquired						100.00%
Percentage of interest acquired	100.00%					100.00%
Cash paid as consideration					$ 300,000
Minimum amount raised in connection with Listing Event						$ 6,800,000
NSR Royalty, percentage	1.00%					1.00%
Consideration for half repurchase of NSR						$ 1,000,000
Consideration for full repurchase of NSR						$ 2,000,000
Number of extensions \| item						2
Extension term						6 months
Number of days deadline for the grant of net smelter return (NSR)	10 days
Percentage increase in the spot price						50.00%
Value of common shares issued						$ 1,600,000
Adjusted value of shares	$ 1,710,991
Number of common shares issued for acquisition of Oregon Energy \| shares	1,710,991
Mineral rights							$ 12,755,725
Oregon Energy LLC \| First Six-Month Extension
ACQUISITION OF OREGON ENERGY
Payments for extension						300,000
Expenditure incurred						250,000
Oregon Energy LLC \| Second Six-Month Extension
ACQUISITION OF OREGON ENERGY
Extension term		225 days
Payments for extension						400,000
Expenditure incurred						$ 250,000
Eagle Energy
ACQUISITION OF OREGON ENERGY
Reimbursement for expenses	$ 219,545
Eagle Energy \| Oregon Energy LLC \| Maximum
ACQUISITION OF OREGON ENERGY
Expenditure incurred			$ 500,000
Eagle Energy \| Oregon Energy LLC \| First Six-Month Extension
ACQUISITION OF OREGON ENERGY
Extension term				6 months
Payments for extension				$ 300,000
Eagle Energy \| Oregon Energy LLC \| Second Six-Month Extension
ACQUISITION OF OREGON ENERGY
Extension term			6 months
Payments for extension			$ 400,000